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The Importance of Epidemiology

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The Importance of Epidemiology Saving Lives. Protecting People. Saving Lives. Saving Money Through Prevention. Protecting People. Saving Money Through Prevention. Saving Lives. Protecting People. Saving Money Through Prevention. Saving Lives. Protecting People. Saving Money Through Prevention. The Importance of Epidemiology Epidemiology is the study of the origin and causes of ◊ Both trainees belonged to Alpha Company, which diseases in a community. It is the scientific method of consisted of 303 trainees total investigation problem-solving used by disease detectives— epidemiologists, laboratory scientists, statisticians, ◊ The number of cases of pneumonia increased during this physicians and other health care providers, and public health time period professionals—to get to the root of health problems and ◊ The outbreak occurred during February 6-14, 2009 outbreaks in a community. Epidemiologists needed to consider important information about the case, such as the number of people at Fort Leonard Example of an outbreak investigation Wood (FLW) training camp, the routine vaccinations trainees and staff receive at and before arrival at FLW, and the housing In February 2009, when two fatal cases of meningitis occurred and training separated by different companies within the at Fort Leonard Wood, MO, an Army training center, it was 554th Battalion at FLW. time for disease detectives to get to work. The investigation would identify the cause of the outbreak and lead to interventions to prevent further cases of the disease. Gathering information Epidemiologists collected data on symptoms, past medical The outbreak history, laboratory testing, exam findings, and recent treatments that trainees and training staff had received. They ◊ Two previously healthy trainees were diagnosed with reviewed medical records from the training camp and civilian Streptococcus pneumonia meningitis and died hospitals, including a list of trainees who were too ill to participate in routine training and medical charts of patients with pneumonia in the troop companies. Centers for Disease Control and Prevention Office of the Director CS226601C Saving Lives. Protecting People. Saving Lives. Saving Money Through Prevention. Protecting People. Saving Money Through Prevention. Saving Lives. Protecting People. Saving Money Through Prevention. Saving Lives. Protecting People. Saving Money Through Prevention. The Importance of Epidemiology Investigation period During the investigation period, February 1-21, 2009, epidemiologists surveyed all trainees and training staff of the 554th Battalion, and trainees who came to the camp from their homes in the community. Nasal and throat swabs were collected from certain trainees and staff. The survey collected: ◊ Demographic information ◊ Information on symptoms of illness ◊ Health care use ◊ Influenza vaccination status ◊ Treatment with antibiotics during the investigation period After the data were collected, the epidemiologists created a database with the information. The data were analyzed to determine trainee and training staff characteristics thought to be associated with the infection. Results Epidemiologists determined that the two fatal cases of meningitis were the only meningitis cases identified during the investigation period, and 72 cases of pneumonia were identified among all the trainees. They were able to rule out the following risk factors as not being associated with getting sick: taking antibiotics, living in a bay (more than four trainees per room), smoking, having one or more illness symptoms, and living on a particular floor of the barracks. Conclusions The epidemiologists used what they learned to prevent future outbreaks from occurring. They were able to stop the outbreak after trainees and training staff received vaccinations and antibiotics, and after hand hygiene and cough etiquette were strengthened. The information gained from this investigation will improve outbreak detection and timely response at military training installations, and new vaccines may provide opportunities to reduce pneumonia among military trainees in the future. Dawood et al.: Outbreak of Pneumonia in the Setting of Fatal Pneumo- coccal Meningitis among US Army Trainees: Potential Role of Chlamyd- ia pneumonia Infection. BMC Infectious Diseases 2011 11:157 For more information on epidemiology, visit www.cdc.gov or call 1-800-CDC-INFO. To view this fact sheet on the web, visit http://www.cdc.gov/24-7/CDCFastFacts/epidemiology.html.
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